Pith Number

pith:DRZISA4J

pith:1997:DRZISA4J6QC4H45EWVM7GJWKFO

not attested not anchored not stored refs pending

Old Massive Ellipticals and S0 in the Hubble Deep Field Vanish from View at $z>1.3$: Possible Solutions of the Enigma

Alberto Franceschini, Alessandro Bressan, Gian Luigi Granato, Laura Silva, Luigi Danese

arxiv:astro-ph/9707064 v1 · 1997-07-04 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DRZISA4J6QC4H45EWVM7GJWKFO}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T14:15:12.528556Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c72890389f405c3f3a4b559f326ca2b9e5c78e02901fd0d7574987da8070ec7

Aliases

arxiv: astro-ph/9707064 · arxiv_version: astro-ph/9707064v1 · doi: 10.48550/arxiv.astro-ph/9707064 · pith_short_12: DRZISA4J6QC4 · pith_short_16: DRZISA4J6QC4H45E · pith_short_8: DRZISA4J

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/DRZISA4J6QC4H45EWVM7GJWKFO \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 1c72890389f405c3f3a4b559f326ca2b9e5c78e02901fd0d7574987da8070ec7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "51685573d4239065a594d39d87712d64781fd421a368b2f4ca8158582cb8dc11",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1997-07-04T16:14:15Z",
    "title_canon_sha256": "415761af1ecf31d12259b47e8d02696351e1ea267a1a6c9a56d325008cb9a57e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9707064",
    "kind": "arxiv",
    "version": 1
  }
}